celestial-guidance

celestial guidance

noun
a guidance system for an aeronautical or space vehicle by which an automatic device in the vehicle takes periodic fixes on celestial bodies to determine the vehicle's position and to guide it along a particular flight path.
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World English Dictionary
celestial guidance
 
n
the guidance of a spacecraft or missile by reference to the position of one or more celestial bodies

Collins English Dictionary - Complete & Unabridged 10th Edition
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